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Questions  

The loop PQ, as shwon in figure moves with a velocity . Both loop and velocity are in the plane of paper and a magnetic field  exists in the region  perpendicular to plane and directed inward. Find the emf induced between P and Q. 

 

a
B  v 2 r
b
B(a+ b+2r ) v
c
B a +b + πr v
d
π r B v

detailed solution

Correct option is B

effective length of conductor  perpendicular to v  is  a+ b+2r

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